`data_objects`

Mostly removes code and adds better usage instructions by using upstream features (#3).

The manifest entry in the output JSON has been renamed to data_objects to make its contents more clear.

Known Issues:

• sheepdog-exporter does not have a "quiet mode" #12
• _all and root metadata types do not serialize to JSON properly #8

sheepdog and indexd export

Exports data from sheepdog and finds the paths from indexd. The resulting manifest is written as a list of Data Objects.

The attached topmed-public.json *does not *include manifest entries for the CRAM index files.

sheepdog CLI client

Export metadata from the DCP!

sheepdog-exporter program project

sheepdog-exporter program project --dcp-url my-url --credentials path/to/credentials --output-path /path/to/write/output

This will write a .json file with the corresponding metadata
with a filename corresponding to the program and project. program-project.json.